1. T. Bjork, J. Bergstrom and S. Hogmark: Proc. 6th Int. Aluminium Extrusion Technology Seminar, ET ‘96, ET Foundation, Chicago, May 1996, 317.
2. H. Lindquist: Proc. Symp. Surfaces of Forming Tools (ed. J. Bergstrom), May 1997, Karlstad, Sweden, 253-260, Uddeholm Research Foundation.
3. New physical vapour deposition coatings applied to extrusion dies